This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 8 |
| 4 | 12 |
| 5 | 16 |
| 6 | 28 |
| 7 | 40 |
| 8 | 72 |
| 9 | 120 |
| 10 | 216 |
| 11 | 376 |
| 12 | 704 |
| 13 | 1264 |
| 14 | 2364 |
| 15 | 4384 |
| 16 | 8232 |
| 17 | 15424 |
| 18 | 29204 |
| 19 | 55192 |
| 20 | 104976 |
| 21 | 199760 |
| 22 | 381492 |
| 23 | 729448 |
| 24 | 1398504 |
| 25 | 2684368 |
| 26 | 5162856 |
| 27 | 9942136 |
| 28 | 19175160 |
| 29 | 37025584 |
| 30 | 71585136 |
| 31 | 138547336 |
| 32 | 268439592 |
| 33 | 520602352 |
| 34 | 1010588256 |
| 35 | 1963413664 |
| 36 | 3817763800 |